LanguageFeatures/Simple-bounds/static/typedef_l1_t07.dart

// Copyright (c) 2018, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

/**
 * @assertion Let [G] be a generic class or parameterized type alias with formal
 * type parameter declarations [F1] .. [Fk] containing formal type parameters
 * [X1] .. [Xk] and bounds [B1] .. [Bk]. We say that the formal type parameter
 * [Xj] has a simple bound when one of the following requirements is satisfied:
 * [Bj] is omitted.
 * [Bj] is included, but does not contain any of [X1] .. [Xk]. If [Bj] contains
 * a type [T] on the form qualified (for instance, [C] or [p.D]) which denotes a
 * generic class or parameterized type alias [G1] (that is, [T] is a raw type),
 * every type argument of [G1] has a simple bound.
 * @description Checks that simple bounds are correct for contravariant [typedef
 * G<X extends A> = Function(X)]. This should be [G<A<dynamic>>]: [X] has the
 * bound [A] which just means [A<dynamic>], and that's the initial and final
 * value for [X] during i2b.
 * @author iarkh@unipro.ru
 */

import "../../../Utils/expect.dart";

class A<X> {}
typedef G<X extends A> = Function(X);

void testme(G source) {
  var fsource = toF(source);
  F<G<A<dynamic>>> target = fsource;

  F<G<A<Null>>> target1 = fsource;
//                        ^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified

  F<G<A<Never>>> target2 = fsource;
//                         ^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
}

void main() {}